Millimeters to Inches Converter
Convert mm to in instantly — and see every other length unit at once.
1 mm=0.03937 in
1 mm in every unit
Millimetersfrom
1mm
Centimeters
0.1cm
Meters
0.001m
Kilometers
1.0000e-6km
Inches
0.03937in
Feet
0.003281ft
Yards
0.001094yd
Miles
6.2137e-7mi
Nautical miles
5.3996e-7nmi
Common Millimeters to Inches conversions
| Millimeters (mm) | Inches (in) |
|---|---|
| 1 mm | 0.03937 in |
| 2 mm | 0.07874 in |
| 5 mm | 0.19685 in |
| 10 mm | 0.3937 in |
| 20 mm | 0.7874 in |
| 25 mm | 0.98425 in |
| 50 mm | 1.9685 in |
| 100 mm | 3.93701 in |
| 150 mm | 5.90551 in |
| 200 mm | 7.87402 in |
| 250 mm | 9.84252 in |
| 300 mm | 11.81102 in |
The formula
Millimeters are the metric unit for small, precise lengths — engineering, manufacturing, and rainfall.
Inches are used in the US and UK for screen sizes, hardware, and small distances.
Worked examples
25.4 mm→1 in— 1 inch
Apply mm ÷ 25.4 with input = 25.4. Result: 1 in.
10 mm→0.3937 in— 10 mm
Apply mm ÷ 25.4 with input = 10. Result: 0.3937 in.
100 mm→3.937 in— 10 cm
Apply mm ÷ 25.4 with input = 100. Result: 3.937 in.
50 mm→1.9685 in— 50 mm
Apply mm ÷ 25.4 with input = 50. Result: 1.9685 in.
FAQ
How do I convert Millimeters to Inches?
Use the formula: in = mm ÷ 25.4. You can also use the converter above — type any value and the result updates instantly.
Where are Millimeters used?
Millimeters are the metric unit for small, precise lengths — engineering, manufacturing, and rainfall.
Where are Inches used?
Inches are used in the US and UK for screen sizes, hardware, and small distances.
How do I convert Inches back to Millimeters?
Use the Inches to Millimeters converter.